#!/usr/bin/env python3
"""Build deterministic, non-authoritative indexes from leaf manifests."""

from __future__ import annotations

import argparse
import sys
from pathlib import Path

import yaml


ROOT = Path(__file__).resolve().parents[1]
DATA = ROOT / "data"


def rendered_catalog() -> str:
    entries = []
    for path in sorted(DATA.glob("*/**/manifest.yaml")):
        document = yaml.safe_load(path.read_text(encoding="utf-8"))
        entries.append({"category": document["category"], "manifest": path.relative_to(ROOT).as_posix()})
    return yaml.safe_dump({"generated": True, "entries": entries}, sort_keys=False)


def main() -> int:
    parser = argparse.ArgumentParser()
    parser.add_argument("--check", action="store_true")
    args = parser.parse_args()
    target = DATA / "catalog.yaml"
    expected = rendered_catalog()
    if args.check:
        if not target.exists() or target.read_text(encoding="utf-8") != expected:
            print("data/catalog.yaml is stale; run scripts/build_catalog.py", file=sys.stderr)
            return 1
        return 0
    target.parent.mkdir(parents=True, exist_ok=True)
    target.write_text(expected, encoding="utf-8")
    return 0


if __name__ == "__main__":
    raise SystemExit(main())